Produção Nacional
Revisado por pares
Vagus nerve regulates the phagocytic and secretory activity of resident macrophages in the liver
2019; Elsevier BV; Volume: 81; Linguagem: Inglês
10.1016/j.bbi.2019.06.041
ISSN1090-2139
AutoresRoberta Cristelli Fonseca, Gabriel Shimizu Bassi, Camila Carvalho Brito, Lorena Barreto Rosa, Bruna Araújo David, Alan de Araujo, Natália Ribeiro Cabacinha Nóbrega, Ariane Barros Diniz, Itamar Couto Guedes de Jesus, Lucíola S. Barcelos, Marco Antônio Peliky Fontes, Daniella Bonaventura, Alexandre Kanashiro, Thiago M. Cunha, Sílvia Guatimosim, Valbert Nascimento Cardoso, Simone Odília Antunes Fernandes, Gustavo Batista Menezes, Guillaume de Lartigue, A. G. de Oliveira,
Tópico(s)Neuropeptides and Animal Physiology
ResumoThe gastrointestinal (GI) tract harbors commensal microorganisms as well as invasive bacteria, toxins and other pathogens and, therefore, plays a pivotal barrier and immunological role against pathogenic agents. The vagus nerve is an important regulator of the GI tract-associated immune system, having profound effects on inflammatory responses. Among GI tract organs, the liver is a key site of immune surveillance, as it has a large population of resident macrophages and receives the blood drained from the guts through the hepatic portal circulation. Although it is widely accepted that the hepatic tissue is a major target for vagus nerve fibers, the role of this neural circuit in liver immune functions is still poorly understood. Herein we used in vivo imaging techniques, including confocal microscopy and scintigraphy, to show that vagus nerve stimulation increases the phagocytosis activity by resident macrophages in the liver, even on the absence of an immune challenge. The activation of this neural circuit in a non-lethal model of sepsis optimized the removal of bacteria in the liver and resulted in the production of anti-inflammatory and pro-regenerative cytokines. Our findings provide new insights into the neural regulation of the immune system in the liver.
Referência(s)